What problems should be paid attention to and avoided in 51CrV4 alloy steel plate cutting?

Most of the steel plate cutting will involve cold cutting and hot cutting, 51CrV4 alloy steel plate is the same, and cold cutting refers to water jet cutting, cutting, sawing or abrasive cutting;
Thermal cutting includes flame cutting, isoparticle cutting and laser cutting.

When cutting wear-resisting steel thick plate, the crack tendency increases with the increase of steel plate thickness and hardness.
In order to prevent the production of steel plate cutting cracks, both hot cutting and cold cutting should pay attention to the relevant requirements, so as to improve the cutting quality.

If the edgings of 51CrV4 alloy steel produce cracks, they will not appear until 48 hours to several weeks after cutting. Therefore, the cutting crack is a delayed crack. The greater the thickness and hardness of 51CrV4 alloy steel, the bigger the cutting crack will appear.
The more effective method to prevent the cracking of 51CrV4 alloy steel plate is preheating before cutting.

The preheating temperature of 51CrV4 alloy steel mainly depends on the quality and thickness of 51CrV4. The preheating method can be carried out by flame gun and electronic heating pad, or heating furnace.
In order to determine the preheating effect of the steel plate, the required temperature should be tested on the hot-spot quilt surface.
It should be noted that the entire interface of 51CrV4 alloy steel plate must be uniformly heated to avoid local overheating in the area in contact with the heat source.